Former All Black prop Craig Dowd is livid at the claims.
Dowd agrees with a call of ex-captain Taine Randell, who says it's gutless not to name names.
"He has cast aspersion on a lot of people and I can say that during my time with the team I saw none of that," Randell told Fairfax.
Dowd says he never saw anything suggesting players were taking steroids.
Former All Black coach John Hart told the Press he had never heard of All Blacks taking steroids, saying "it would surprise me greatly".
Ralston has also coached triathlete Hamish Carter, worked for Netball New Zealand and with Arthur Lydiard.
He's also worked for Nike, alongside international stars including Tiger Woods, Michael Jordan and Carl Lewis.
The Sports Insider is due to be released for sale next week.
- Herald Online staff/Newstalk ZB